Right. The number of those who remember or know the 11/22/63 date rises dramatically if the people you're asking are old enough. My dad says that every generation has 1 or 2 dates during their lives when events happened that you will always remember. And not just the date, but where you were and what you were doing. For us, it's 9/11/01. Even though I was only 4, I clearly remember first hearing about it. For those old enough to be living then, JFK's assassination is one of those moments. My grandfather told of when he first heard about Pearl Harbor. Disasters or traumatic events imprint strongly in the memory if you're living through them. Reading about them in a history book, not as much.